Who is the best urologist in usa? As a doctor who would you see for urology care?

Depends. There are multiple sub specialities within urology, so it depends on your reasoning for seeking urologic care. .
There are many... I doubt that there is one best urologist anywhere--it depends on the nature of the problem, the age of the patient, and the expertise of the doctor. Get a recommendation from your family doctor, make sure the urologist is board certified, and then find a urologist you like and trust.